Filter for cigarettes



June 21, 1960 c. P. CRAWFORD 2,941,533

FILTER FOR CIGARETTES Filed Oct. 10. 1957 FIE.1

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FILTER FOR CIGARE'ITES Charles P. Crawford, 79 W. Monroe St., Room 1123, 'Chicago, 111.

Filed Oct. 10, 1957, Ser. No. 689,337

1 Claim. (Cl. 13110) made of celluloses to absorb the tars, nicotine, acids,

resins and other residues of the tobacco smoke as the smoke travels through the filter.

The close compactness and irnporosity of the fibers of celluloses rapidly condenses the harmful impurities of tobacco smoke forming a heavy congealed condition at the top of the filter even Where only one-quarter of the cigarette has been smoked. The mass of foreign matter all around the top of the filter suppresses the filtering action, and also causes the cigarette not to draw in a free, easy fiOWing manner as it should flow.

Moreover, the heat of burning tobacco and the smoke therefrom is increased by the excessive overloaded condition of the filter. Therefore, the increased temperature of the tobacco and the smoke caused by the clogged condition of the filter, not only destroys the fine flavor of the tobacco, but also creates a strong, bitter, rancid taste, definitely developing a straw-like taste.

Furthermore, when the top part of a cellulose filter has been heavily coated with foreign matter, an increased amount of injurious formic acid is developed and also multiplies the harmful toxic effects of the cigarette smoke.

The material used in my cigarette filter can be made of absorbent tissue paper or any other suitable filtering material supplying adequate cleansing properties qualified to remove the tars, nicotine, resins, acids and other harmful residues from tobacco smoke.

Furthermore, while the apertures and crimped baflics are shown in rectangular design, any and all other suitable forms, designs and arrangements can be used.

The various features of novelty whereby my invention is characterized will be hereinafter pointed out, with particularity in the claim; but for a full understanding of the invention and its various objects and advantages, reference may be had to the following detailed description taken in connection with the accompanying drawing wherein:

Figure 1 is an elevational view of a cigarette partly in section;

Fig. 2 is a fragmentary elevational enlarged view partly in section;

Fig. 3 is an end view of the filter end of the cigarette;

Fig. 4 is a fragmentary enlarged section taken on line 4-4 of Fig. 2.

Fig. 5 is a section taken on line 5-5 of Fig. 2;

. 2 Fig. 6 is a perspective view of the bames before being crimped and folded back;

Fig. 7 is a perspective view showing the bafiie bent back;

Fig. 8 is a section taken on line 8-8 of Fig. 6; Fig. 9 is a section taken online 9-9 of Fig. .7. Referring now in detail to the drawings, 10 represents a cigarette as a whole, 11 is the filter, 12 is the cigarette paper, 13 is the tobacco, 14 is the filtering material, 15 is a serrated opening, 16 is a folded line or crimp, 17 is a punched-up flap serving as a spacer and bafiie, 18 are channels formed by the triangular portions '17.

Referring to the drawings, 10 representsa cigarette as a whole, conveniently located at one end of which is a tissue paper filter 11. The smoke from a lighted, burning cigarette travels thru the tobacco 13, then on thru the filter 14. The filtering material can be light, medium or heavy absorbent tissue paper or any other suitable filtering material supplying adequate cleansing properties required to remove the tars, nicotine, acids, resins and other injurious residues from tobacco smoke.

Tissue paper, which unlike cellulose is free from traces of hydroxides, react with smoke ingredients to produce harmful formic acid, thereby also increasing the injurious toxic effects of tobacco smoke.

The serrated apertures 15 in zig-zagged relation to each other, provide free uninterrupted escape for the smoke. 16 is a crimped or fluted arrangement formed on the punched-up, raised-up portion 17 while assisting in part to the filtering operation; apertures 15 also institute a cooling action lowering the temperature of the smoke.

This cooling of the smoke permits the tobacco to retain almost all of its fine and pleasurable taste.

The crimped part '16 of the triangular upright punchedup portion 17 when folded back, nests against the filtering material 14 forming a bafile. While a triangular design is shown, any other suitable design, form or arrangement can be used.

The baffles 17 separate the layers of filtering material 14, forming channels 18 in a multifold series, permitting the tobacco smoke to enter the filter 11 in a free and easy manner.

The progressive flow of the tobacco smoke drawn thru the filter 11 enters the channels 18 and passes on through apertures 15 forming an abutting action against bafiles 17, breaking up the smoke into a swirling, spreading, circulating movement sending it into every minute part of the filter 11, heavily saturating the filtering material 14 with injurious tars, nicotine, acid, resins and other harmful residues of tobacco smoke.

While I have illustrated and described with particularity only a preferred form of my invention, I do not desire to be limited to the exact details thus illustrated and described, but intend to cover all forms and arrangements that come within the definitions of my invention constituting the appended claim.

I claim:

A tobacco cigarette comprising a column of tobacco and a filter conveniently located at one end and a wrapper surrounding said tobacco and filter, said filter comprising a sheet of tissue paper rolled in cylindrical form, said sheet having flaps cut therein and said flaps being folded back on said sheet and along one edge only to provide spacers between adjacent layers of said rolled sheet and to provide apertures connecting the longitudinal channels formed by the spacing between said adjacent layers as determined by said spacers, said folded back flaps also serving as bafiles to cause the smoke stream in a particular channel to spread both peripherally within its channel, and radially through said apertures into adjacent channels, said folded back flaps being in staggered relation to each other and spaced apart from each other in isenfise 2105.: prox mity lengthwise of the filter to pro ide a multifold series of apertures, bafliles, and channels covering the entire area of the filter forming the means whereby thetobaccc'srnokei will 'have free and easy passage entirely throughout every minute part of the filter creating 5 a finely balanced, progressive, fast moving filtering operation heavily saturating the filtering material with tars, nicotine, acids; resins and other residues of tobacco smoke, said flaps and apertures being'of triangular shape.

- 4 References Cited in the file of this patent UNITED STATES PATENTS win 

